Chimney attachment



July 8, 1958 A. BURGER I 2,842,041

CHIMNEY ATTACHMENT Filed New). 1. 1954 wiTNESs= INvENToR: E.; @om ,4MM/WJ (Jim/14M United States Patent O CHlM'NEY ATTACHMENT Armin Burger, Bern, Switzerland Application November' 1, 1954, Serial No. 466,184

Claims priority, application Switzerland November 2, 1953 2 Claims. (Cl. 98-78) The present invention relates to a chimney `attachment with 4at least two mutually superimposed nozzle bodies, which between one another form wind conduct-ing conduits leading lfrom the outside inwardly `and upwardly.

The invention has the primary object of providing a chimney attachment of the kind referred to wherein rain water which may have entered the chimney .attachment is safely drained off laterally `and lthereby prevented from entering the chimney stack.

With this and other objects in view l provide a chimney a-ttachment comprising in combination:

At least two super-imposed nozzle bodies forming between `them wind guiding conduits directed inwardly and upwardly from outside, and an air distributor body arranged in a vertical middle plane of the chimney attachment between at least two mutually opposite inner orices of said wind-guiding conduits, the said air distributor body being symmetrical with respect to the said vertical middle plane and having an upper central web with concave faces curving outwardly, the cross section area of the portion of the said distributor body below the said central web diminishing Lfrom the end faces towards the middle of the said portion.

Any rain water adhering to the said yair distributor body runs from the reduced inner part of said lower portion down towards the enlarged end faces thereof, `and can be drained olf from there to the outside of the chimney attachment.

These and other objects `and features of my said invention will be clearly yunderstood from the following description of an embodiment thereof given by way of example with reference to the accompanying drawing, in which:

Fig. l shows a longitudinal section through a row of chimneys;

Fig. 2 -is a section taken .along the line IIAIII of Fig. l;

Fig. 3 isa perspective view of a member shown in Figs. 1 and 2;:and

Fig. 4 is ra section of a chimney cowl having wind passages on all four sides.

The chimney stake shown in Fig. l comprises three chimneys 1, 2, 3, side by side, on each of which are separate cowls built up of three hollow cowl members 11, supported one on top of the other. IOn two opposite sides of the cowl between the members 11, are inwardly and upwardly inclined air passages 12 ('Fig. 2) while on the other opposite pairs of sides `there are plain walls 14. Between the masonry portions of the chimney and the lowest cowl member 11 truncated conical or pyramidal pieces 101 lare inserted which support the lowest cowl member and which have water drip -ledges 102 projecting outwardly. In the longitudinal plane of symmetry of the row of chimneys air distributor bodies or elongated deliecting members 13 are provided which are shaped symmetrically to this longitudinal plane and toa vertical plane of symmetry passing through the longitudinal center of the dellecting member 13. Each deflecting member 13 has an upper middle web 130 with flank faces 131 respectively located on either side of the longitudinal plane of sym- ICC metry `and curving concavely downwards and outwards and designed for detlectin g descending winds into the wind conducting conduits 12. Each of the elongated deflecting members 13 have .also a pair of oppositely arranged lower side portions 133 tapering toward a longitudinal plane of symmetry of the deliccting members 13 to form a sharp bottom edge 13d which is inclined downwardly and outwardly from the center of the detlecting member towards the end faces 13S thereof. The side portions 133 are respectively directed toward the air passages 12 as can be clearly seen `from Fig. 2. The edge at which the upper face 131i meets with the faces on the lower portions 133 of the del'lecting member diverges from aplane of symmetry passing `through the center of the defiecting member and substantially normal to forementioned longitudinal plane of symmetry thereof towards the opposite ends of the dellecting member 13. The cross-section taken through the lower portion of the deilecting member at this transverse planeof symmetry has therefore a smaller area than the end faces of the deecting member. The lower side portions 133 are designed conduits to prevent a nonpermissible reinforcement of the draught through strong side winds flowing through the air passage 12, by dellecting these air lows and to reduce the draught effect through the formation of eddies. When lthe weather is becalmed or the wind velocities are low they are ineffective in this sense, and do no-t hamper the flow of the smoke, since the plan view area of the distributor bodies 13 is smaller than the yarea of the chimney aperture.

The `aforesaid intersect-ing edge 134 of the distributor body extends with opposite free end portions thereof over drain conduits or channel means 13o and edge 131i is designed todivert rain `water into drain conduits 136 on the front `faces of opposite inner faces 14 of the chimney. These `drain conduits 135 have `a slope towards yat least one of the -two lateral faces of the chimney, so that they drain the water into the air conducting conduits 12 and prevent it from penetrating into the chimney.

The end faces or" the upper web 1.30 of the deflecting members 13 are outwardly inclined and rest against the inner top edges of the ywalls 1d, 'as shown in Fig. l, so that the members 13 are securely mounted on the chimney. The end faces may also be stopped and rest in appropriately shaped cutouts formed in `the upper portion of the chimney structure, as shown in Fig. 4.

A chimney attachment constructed in the manner described secures practically equal draught conditions at calm weather, with strong lateral winds and descending winds, which is very important as regards the adjustment of the stoves.

While l have herein described and illustrated in the accompanying drawings what may be considered a typical and particularly useful embodiment of my` said invention, I wish it to be understood that l do not limit myself to the particular details `and dimensions described and illustrated vfor obvious modifications will occur to a person skilled in the art.

What l claim as my invention and desire to secure by Letters Patent, is:

1. ln a chimney structure in combination, a rectangular chimney top including two pairs of oppositely arranged wall portions, one pair of said oppositely arranged wall `portions being lformed with inwardly and upwardly diaaaaoai ed tudinal plane of symmetry of said deliecting member to form a sharp bottom edge, said bottom edge being inclined downwardly and outwardly from the center of said deecting member toward and extending with opposite free end por-tions thereof, respectively over said channel means on the inner face yof said other pair of oppositely arranged wall portions thereof, whereby rain water collecting `on said deflecting member will be directed into said channel means and by the same into said passages and youtwardly `of said chimney structure.

2. lIn a chimney structure in combination, a rectangular chimney top including two pairs of oppositely ar ranged wall portions, one pair `of said oppositely arranged Wall portions being formed with a plurality of superimposed inwardly and upwardly directed air passages; channel means on the inner face of the other pair `of oppositely arranged wall por-tions inclined toward and communicating, respectively, with a pair of said inwardly and upwardly `directed passages in said one pair of Ioppositely arranged wall portions; and an elongated deecting member located in said top portion of said chimney structure symmetrically with respect to a first vertical plane of symmetry through the longitudinal center of said deiiecting member and la second vertical plane or symmetry transverse to said irst plane of symmetry at the center `of said `dellecting member and extending between said other pair of oppositely arranged wall portions,

said deflecting member having on either side `of said rst plane `of symmetry an upper face curving downwardly and -outwardly and Ia lower face converging from the lower edge fof the upper lface toward said irst plane of symmetry `and lying substantially `opposite the inner end of one of said inwardly and upwardly directed air passages, the edge `at which said .upper and `lower -faces meet diverging from said second plane of symmetry toward the ends `of said deecting member, and the edge in said first plane of symmetry at which the lower faces of said deectin-g member meet being inclined downwardly from said second plane `of symmetry toward the ends of said deecting member, said ends of said deecting member extending over said channel means, whereby rain water collecting on said upper Ifaces `of said deilecting member will lbe directed into said channel means and by the same into said passages `and `outwardly of said chimney structure.

References Cited in the le of this patent UNITED STATES PATENTS 2,544,776 Burger Mar. 13, 1951 FOREIGN PATENTS 811,999 France Jan. 27, 1937 668,712 Great Britain Mar. 19, 1952 

